Phone slow after ICS upgrade & remove ICS??????

Does anyone else have issues with Samsung Galaxy 2 running slower since upgrade to ICS, my main issues are screen not responding and the WI-FI just not connecting, it highlights it on the icon but the line under the WI-FI does not come on. I so wish I did not upgade to this rubbish ICS and anyone reading this in 2 minds dont bother. Also can I go back to what I had before the ICS upgrade when it worked fine. I really don't see what better the phone is with ICS to be honest.

Still waiting for ics to be rolled out by samsung for my Note. However, I have upgraded both my tablets, an Asus Transformer and an Acer with no probs at all. Much improved interface and quicker to access different apps.